21726164574315 has 12 divisors (see below), whose sum is σ = 37658685262224. Its totient is φ = 11587287772944.

The previous prime is 21726164574277. The next prime is 21726164574383. The reversal of 21726164574315 is 51347546162712.

21726164574315 is a `hidden beast` number, since 2 + 1 + 7 + 2 + 6 + 1 + 64 + 574 + 3 + 1 + 5 = 666.

It is not a de Polignac number, because 21726164574315 - 2⁶ = 21726164574251 is a prime.

It is a super-2 number, since 2×21726164574315² (a number of 27 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 241401828559 + ... + 241401828648.

It is an arithmetic number, because the mean of its divisors is an integer number (3138223771852).

Almost surely, 2^{21726164574315} is an apocalyptic number.

21726164574315 is a deficient number, since it is larger than the sum of its proper divisors (15932520687909).

21726164574315 is a wasteful number, since it uses less digits than its factorization.

21726164574315 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 482803657218 (or 482803657215 counting only the distinct ones).

The product of its digits is 8467200, while the sum is 54.

The spelling of 21726164574315 in words is "twenty-one trillion, seven hundred twenty-six billion, one hundred sixty-four million, five hundred seventy-four thousand, three hundred fifteen".